/*
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.aformatik.android.apps.jfs.de.ui;

import static de.google.android.apps.iosched.util.UIUtils.buildStyledSnippet;

import de.aformatik.android.apps.jfs.R;
import de.google.android.apps.iosched.provider.ScheduleContract.Vendors;
import de.google.android.apps.iosched.util.NotifyingAsyncQueryHandler;
import de.google.android.apps.iosched.util.UIUtils;
import de.google.android.apps.iosched.util.NotifyingAsyncQueryHandler.AsyncQueryListener;

import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.BaseColumns;
import android.text.Spannable;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.TextView;

/**
 * {@link ListActivity} that displays a set of {@link Vendors}, as requested
 * through {@link Intent#getData()}.
 */
public class VendorsActivity extends ListActivity implements AsyncQueryListener
{
	private CursorAdapter mAdapter;
	private NotifyingAsyncQueryHandler mHandler;

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);

		if (!getIntent().hasCategory(Intent.CATEGORY_TAB))
		{
			setContentView(R.layout.activity_vendors);
			((TextView) findViewById(R.id.title_text)).setText(getTitle());
		}
		else
		{
			setContentView(R.layout.activity_vendors_content);
		}

		final Uri vendorsUri = getIntent().getData();

		String[] projection;
		
		if (!Vendors.isSearchUri(vendorsUri))
		{
			mAdapter = new VendorsAdapter(this);
			projection = VendorsQuery.PROJECTION;
		}
		else
		{
			mAdapter = new SearchAdapter(this);
			projection = SearchQuery.PROJECTION;
		}

		setListAdapter(mAdapter);

		// Start background query to load vendors
		mHandler = new NotifyingAsyncQueryHandler(getContentResolver(), this);
		mHandler.startQuery(vendorsUri, projection, Vendors.DEFAULT_SORT);
	}

	public void onQueryComplete(int token, Object cookie, Cursor cursor)
	{
		startManagingCursor(cursor);
		mAdapter.changeCursor(cursor);
	}

	/** Handle "home" title-bar action. */
	public void onHomeClick(View v)
	{
		UIUtils.goHome(this);
	}

	/** Handle "search" title-bar action. */
	public void onSearchClick(View v)
	{
		UIUtils.goSearch(this);
	}

	@Override
	protected void onListItemClick(ListView l, View v, int position, long id)
	{
		// Launch viewer for specific vendor
		final Cursor cursor = (Cursor) mAdapter.getItem(position);
		final String vendorId = cursor.getString(VendorsQuery.VENDOR_ID);
		final Uri vendorUri = Vendors.buildVendorUri(vendorId);
		
		startActivity(new Intent(Intent.ACTION_VIEW, vendorUri));
	}

	/**
	 * {@link CursorAdapter} that renders a {@link VendorsQuery}.
	 */
	private class VendorsAdapter extends CursorAdapter
	{
		public VendorsAdapter(Context context)
		{
			super(context, null);
		}

		@Override
		public View newView(Context context, Cursor cursor, ViewGroup parent)
		{
			return getLayoutInflater().inflate(R.layout.list_item_vendor, parent, false);
		}

		@Override
		public void bindView(View view, Context context, Cursor cursor)
		{
			((TextView) view.findViewById(R.id.vendor_name)).setText(cursor.getString(VendorsQuery.NAME));
			((TextView) view.findViewById(R.id.vendor_location)).setText(cursor.getString(VendorsQuery.LOCATION));

			final boolean starred = cursor.getInt(VendorsQuery.STARRED) != 0;
			final CheckBox starButton = (CheckBox) view.findViewById(R.id.star_button);
			
			starButton.setVisibility(starred ? View.VISIBLE : View.INVISIBLE);
			starButton.setChecked(starred);
		}
	}

	/**
	 * {@link CursorAdapter} that renders a {@link SearchQuery}.
	 */
	private class SearchAdapter extends CursorAdapter
	{
		public SearchAdapter(Context context)
		{
			super(context, null);
		}

		@Override
		public View newView(Context context, Cursor cursor, ViewGroup parent)
		{
			return getLayoutInflater().inflate(R.layout.list_item_vendor, parent, false);
		}

		@Override
		public void bindView(View view, Context context, Cursor cursor)
		{
			((TextView) view.findViewById(R.id.vendor_name)).setText(cursor.getString(SearchQuery.NAME));

			final String snippet = cursor.getString(SearchQuery.SEARCH_SNIPPET);
			final Spannable styledSnippet = buildStyledSnippet(snippet);
			
			((TextView) view.findViewById(R.id.vendor_location)).setText(styledSnippet);

			final boolean starred = cursor.getInt(VendorsQuery.STARRED) != 0;
			final CheckBox starButton = (CheckBox) view.findViewById(R.id.star_button);
			
			starButton.setVisibility(starred ? View.VISIBLE : View.INVISIBLE);
			starButton.setChecked(starred);
		}
	}

	/** {@link Vendors} query parameters. */
	private interface VendorsQuery
	{
		String[] PROJECTION =
		{ BaseColumns._ID, Vendors.VENDOR_ID, Vendors.NAME, Vendors.LOCATION, Vendors.STARRED, };

		@SuppressWarnings("unused")
		int _ID = 0;
		int VENDOR_ID = 1;
		int NAME = 2;
		int LOCATION = 3;
		int STARRED = 4;
	}

	/** {@link Vendors} search query parameters. */
	private interface SearchQuery
	{
		String[] PROJECTION =
		{ BaseColumns._ID, Vendors.VENDOR_ID, Vendors.NAME, Vendors.SEARCH_SNIPPET, Vendors.STARRED, };

		@SuppressWarnings("unused")
		int _ID = 0;
		@SuppressWarnings("unused")
		int VENDOR_ID = 1;
		int NAME = 2;
		int SEARCH_SNIPPET = 3;
		@SuppressWarnings("unused")
		int STARRED = 4;
	}
}
